Schemas with Definitions not generated correctly without -x flag

[sethfri]

Take the following schema example:

{
  "$schema": "http://json-schema.org/draft-04/schema#",
  "type": "object",
  "description": "Example",
  "additionalProperties": false,

  "properties": {
    "foo":          { "type": "string" },
    "bar":          { "$ref": "#/definitions/baz" }
  },

  "definitions": {
    "baz": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "header": {
          "description": "This is the header",
          "type": "string"
        },
        "message": {
          "description": "This is the message",
          "type": "string"
        },
      }
    }
  }
}

Run $ nidyx test.json.schema - o test --json-model or $ nidyx test.json.schema TST -o test --json-model to use a prefix as the README describes. This generates Model.{h,m}. Model.h looks like:

@interface Model : JSONModel

@property (strong, nonatomic) NSString<Optional> *foo;
@property (strong, nonatomic) Model<Optional> *bar;

@end

Model.m is a blank implementation. TSTBazModel is not generated at all. If you run $ nidyx test.json.schema -x TST -o test --json-model, everything works as expected

Fix: The -x flag should be a) documented in the README and b) marked as required or made optional